Scientists have known about slingshot spiders since the 1930s, but this is the first study of the kinematic energy, velocity, and acceleration of these Peruvian arachnids. They build a web and then stretch it with a piece of silk to create a three-dimensional spring. They store enough energy in that web spring to produce an acceleration 100 times that of a cheetah. The acceleration creates the force of roughly 130 G’s. That’s more than ten times what fighter pilots can withstand without blacking out.
Slingshot spiders make a web and a tension line as tools to catch their prey. When the target comes within striking distance, the spider releases the tension line and rides the web at ultrafast speed to capture it. This creates the fastest full-bodied motion of any spider. What’s more, it doesn’t involve muscles which frogs, crickets, or grasshoppers use to launch themselves. Every night, the spider creates this complex, three-dimensional spring with vastly more power and energy density than nanotubes or other synthetic materials created by humans.
Researchers are interested in the technique slingshot spiders use to store energy in web silk because engineers could use it to power tiny robots or similar devices. Once again, we have a situation where something found in nature can lead to new materials or processes for humans. When God designs something applying the engineering to make it work, we can study it and use the principles to create useful tools. The lesson of history is that the creation is full of wisdom and design that we can apply for our benefit.
Those of us who live in the United States Midwest are familiar with a very large spider species that we see frequently see in our sheds and outdoor equipment. These spiders have a creamy or golden cast with stripes on their heads and brown, gray, and black markings. Wolf Spiders are One of God’s Dandy Designs.
Wolf spiders have stout bodies covered with sensory hairs. They can run very quickly, and they don’t spin webs. Wolf spiders have eight eyes arranged in three rows. The bottom row has four small eyes, the second row has two large forward-facing eyes, and the top eyes are toward the back and side of the head.
After mating, female wolf spiders place their eggs in a silken sac. They attach the pouch to their bodies and carry them around until they are ready to hatch. When they hatch, the mother assists them by carrying them on her back. She can carry up to 100 spiderlings until they are prepared to function on their own. Sometimes the females will step into a water source and allow the babies to crawl down and get a drink and then crawl back up for safety.
One of the evidences for God is the specialized design features built into living organisms. There are indications of design and intelligence that are difficult, if not impossible, to explain by chance. There are about 35,000 named species of spiders, but scientists are still discovering more unique spiders.
Spiders have many features that allow them to provide balance in the natural world by eating insects which would otherwise pose a threat to all life on Earth. Spiders capture their prey in various ways. We usually think of spiders making webs. Most of them do, but not all. Many unique spiders use other tactics to grab insects, while the ones that make webs use a variety of shapes and patterns in a variety of locations. Even the way they use their webs varies.
One family of spiders called ray spiders (Theridiosomatidae) make cone-shaped webs. But even ray spiders don’t all use their cone-shaped webs in the same way. In the Peruvian Amazon, there is a ray spider that weaves a cone and attaches a single strand of silk to its tip. The spider reels in the strand to put tension on the web. Instead of waiting for an insect to fly into the web, this spider takes a more proactive approach. When an insect flies in front of the cone, the spider releases the single strand. With the tension released, the web shoots out with the spider riding the tip of it like a slingshot. The helpless insect gets nabbed in mid-air. For obvious reasons, this spider is called the slingshot spider.
The tip of the cone with the spider attached reaches the target with amazing speed before the insect can escape. Scientists have measured the acceleration of the spider riding the slingshot at 100 times the acceleration of a cheetah, the fastest land animal on the planet. As far as unique spiders, we believe that the slingshot spider holds the title of world’s fastest spider.
This spider creates a very complex and well-designed food-collecting tool. The spider must make the cone in exactly the right shape, and with the right chemical make up of the strands for elasticity. Who taught the slingshot spider this amazing trick and gave it the physiology needed to carry it out? We see God’s design and chemistry in everything from the atom to the universe to every living thing on Earth, including unique spiders.
— John N. Clayton and Roland Earnst
Nearly two centuries ago a young biologist on a ship 60 miles from the nearest coastline was amazed by some spiders. The spiders were showing up on his ship when they had not been there before. Since his discovery, other researchers have seen similar mysterious migrations of ballooning spiders across open waters. Scientists have studied this amazing technique on Robinson Crusoe Island in the Pacific Ocean 415 miles off the coast of Chile.
The spiders climb to a high point and secure themselves with silk. The spiders have fine hairs called trichobothria which they use to sense wind direction and electric conditions. When it rains, electrons are carried to the ground making the ground negatively charged and the upper atmosphere positively charged. The spiders sense the field that results from this separation of charge. When conditions are right, the spiders release a silk that is so light that even the slightest breeze will keep it afloat. As the spiders spin off this low-density silk, their spinnerets also acquire a negative charge from the ground. The negative charge of the ground repels the negative charge on the silk. When the electric field and the breeze are strong enough, the spiders release the securing silk and become lifted into the air.
The ballooning spiders can rise up to 2.8 miles high and ride the winds for thousands of miles needing no food or water. When they land, they attach themselves and deposit their eggs. The ones that land on Robinson Crusoe Island are called ghost spiders.
The question of why this system is built into the spider’s DNA, how it knows when to send out different kinds of silk, and how it knows to use its legs for flight control is still being studied. There is no connection to other spiders and no compelling force to make them leave their original habitat.